Company News-Baochang Special Alloy Technologyy Co. Ltd.

The shielding gas pressure of the butt welding flange is to avoid slight leakage of the butt welding flange. The shielding gas in the furnace should be connected to a certain positive pressure. Assuming that it is hydrogen shielding gas, it is generally required to be above 20kBar. Annealing air, butt welding flange generally uses pure hydrogen as annealing air, and the air purity is above 99.99%. If the other part of the air is an inert gas, the purity can be lower, but it cannot contain too much oxygen and water vapor.

2022-10-24 15:17

Causes of flange leakage

Staggered seam means that the pipe and flange are vertical, but the two flanges are not concentric, and the flanges are not concentric, so the surrounding bolts cannot freely penetrate the bolt holes. There is no other method, only reaming or small bolts are screwed into the bolt holes, which will reduce the tension of the two flanges, and the sealing surface of the sealing surface is also deviated, which is very easy to leak.

2022-10-24 15:18

Polishing Methods for Duplex Steel Flanges

There are four types of polishing methods for dual-phase steel flanges: manual, mechanical, chemical and electrochemical. The corrosion resistance and decoration of the flange can be improved by polishing. The existing stainless steel electropolishing solution still uses phosphoric acid and chromic anhydride. During the polishing and cleaning process, some chromium and phosphorus will be discharged into the waste water. pollution of the environment.

Baochang Special Alloy Technology Co. Ltd.

Address: No. 103-17, Hongxin Road, Fuqiao Town, Jiangsu Province

Tel：19962116358

Email：zhoujia@bcalloy.com

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